A source familiar with McGahn's thinking said the former White House counsel will do what the law requires, but no decision has been made yet about whether to cooperate with House Judiciary. https://t.co/ARWRbr94vl— Manu Raju (@mkraju) April 24, 2019
Either house of Congress can vote to hold in contempt a witness who refuses to provide testimony or produce requested documents pursuant to a congressionally authorized subpoena. As set out in 2 U.S.C. § 194, the U.S. attorney for the District of Columbia has the “duty  to bring the matter before the grand jury for its action.” Contempt of Congress, which is a federal misdemeanor, is punishable by a maximum $100,000 fine and a maximum one-year sentence in federal prison. But if the executive branch is not inclined to prosecute a contemnor (the contemnor is a person or entity who is guilty of contempt before a judicial or legislative body), Congress will have a difficult time implementing such a penalty. Congress can also file a lawsuit asking a judge to order the witness to provide the information, raising the additional possibility of imprisonment for contempt of court.